Structural Light weight Concrete
Lightweight concrete can be defined as a type of concrete which includes an expanding
agent in that it increases the volume of the mixture while giving additional qualities
and lessened the dead weight. It is lighter than the conventional concrete. The
use of lightweight concrete has been widely spread across countries such as USA,
United Kingdom and Sweden.It was first introduced by the Romans in the second century
where ‘The Pantheon’ has been constructed using pumice, the most common type of
aggregate used. The building of ‘The Pantheon’ of lightweight concrete material
is still standing eminently in Rome until now for about 18 centuries.It shows that
the lighter materials can be used in concrete.Free Download Lightweight Concrete
Design Seminar with complete PPT.
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Composite Elevated WaterTank
A composite elevated water tank is comprised of a welded steel tank for watertight
containment, a single pedestal concrete support structure, a foundation, and accessories.
These tanks are also sometimes referred to as “concrete pedestal elevated tanks.”
The steel tank provides a proven, watertight container derived from the AWWA D100
Standard for welded steel tanks which has demonstrated superior performance through
decades of use by the water industry. The reinforced concrete support column provides
a cost effective, structurally robust pedestal with minimal maintenance.
Preferred Tags: Elevated Water Tank,Water Resource Management,Concrete Pedestal
Tanks
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Effect of marine water on concrete made from OPC and PPC
Nowadays concrete is increasingly being used in more hostile environmental condition
And durability is depend on materials In marine structure the concrete has to withstand
the physical, chemical , mechanical action of sea water and alternate wetting and
drying condition with salted water Important factor is permeability. The deterioration
is mainly because of sulphate and chloride content of sea water Dance concrete prevent
deterioration and this can be achieved by replacing cement by mineral admixture.
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Gravity Dam
Gravity dams were the first type of dam constructed, and were made from stone bricks.
It was built by the Egyptians around 2950 to 2750 BC. The dam called Saddel-Kafara
and meaning “Dam of the Pagans”. A covering of limestone was applied to the dam
to protect it from erosion. Due to shoddy and hasty workmanship, the dam failed
to be watertight eventually resulting in its erosion after only a few years.Free
Download Complete Powerpoint Presentaion on Gravity Dam.
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LATEX MODIFIED FIBRE REINFORCED CONCRETE
Fibre reinforced concrete (FRC) is concrete containing fibrous material which increases
its structural integrity. It contains short discrete fibres that are uniformly distributed
and randomly oriented. Fibres include steel fibres, glass fibres, plastic fibres,
carbon fibres and natural fibres. Within these different fibres the character of
fibre reinforced concrete changes with varying concretes, fibre materials, geometries,
distribution, orientation and densities.When the loads imposed on concrete approach
that for failure cracks will propagate, sometimes rapidly; fibres in concrete provide
a means of arresting the crack growth. Reinforcing steel bars in concrete have the
same beneficial effect because they act as long continuous fibres. Short discontinuous
fibres have the advantage, however, of being uniformly mixed and dispersed throughout
the concrete. Fibres are added to a concrete mix which normally contains cement,
water and fine coarse aggregate.
Preferred Tags:Fiber reinforced concrete,structural Design with Fibre,Free Civil
Engineering Seminar
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Wind Load on Antenna Structure
Wind forces undoubtedly play a significant role in the design and operations of
large steerable antennas, and the need for satisfactory estimates of these forces
is becoming increasingly evident. A resolution of the problem of predicting wind
forces on antennas depends upon improved knowledge of the variation of pressures
and local velocities on the reflector and it’s supporting framework, integrated
loadings, and ground effect for both solid and porous conditions.
Preferred Tags:Wind load on Antenna Structure,Free Load Structure Seminar
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Ultra High Performance Concrete
ultra-High Performance Concrete (UHPC) is one of the latest advances in concrete
technology and it addresses the shortcomings of many concretes today: low strength
to weight ratio, low tensile strength, low ductility, and volume instability. In
addition to achieving high compressive strengths in excess of 25,000 psi (sometimes
greater than 30,000 psi), UHPC is also nearly impermeable. This very low permeability
allows UHPC to withstand many distresses normally associated with NSC and HPC such
as freeze-thaw deterioration, corrosion of embedded steel, and chemical ingress.
It is also known as Reactive Powder Concrete (RPC). It is a high strength, ductile
material formulated by combining Portland cement, silica fume, quartz flour, fine
silica sand, high-range water reducer, water, and steel or organic fibers.
Preferred Tags:Ultra High Performance Concrete,Reactive Powder Concrete
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Voided Slab-Bubble Deck Technology
The first hollow concrete block was designed in 1890 by Harmon S. Palmer in the
United States. After 10 years of experimenting, Palmer patented the design in 1900.
Palmer's blocks were 8 in (20.3 cm) by 10 in (25.4 cm) by 30 in (76.2 cm), and they
were so heavy they had to be lifted into place with a small crane. By 1905, an estimated
1,500 companies were manufacturing concrete blocks in the United States. These early
blocks were usually cast by hand, and the average output was about 10 blocks per
person per hour. Today, concrete block manufacturing is a highly automated process
that can produce up to 2,000 blocks per hour.
Preferred Tags:Voided Slab Seminar,Bubble Deck Technology Seminar
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Biological nutrient removal in waste water treatment-Download Civil Engineering
Projects
The rising concentration of harmful nutrient compounds – specifically nitrogen and
phosphorus – in municipal wastewater treatment plant discharge causes cultural eutrophication
(nutrient enrichment due to human activities) in surface waters. Summer algal blooms
are a familiar example of this eutrophication, and can present problems for ecosystems
and people alike: low dissolved oxygen, fish kills, murky water, and depletion of
desirable flora and fauna.Because conventional biological processes designed to
meet secondary treatment effluent standards typically do not remove total nitrogen
(TN) and total phosphorus (TP) to the extent needed to protect receiving waters,
wastewater treatment facilities are increasingly being required to implement processes
that reduce effluent nutrient concentrations to safe levels. This can be a challenge
for wastewater treatment plants because it usually involves major process modifications
to a plant, such as making a portion of the aeration basin anaerobic and/or anoxic,
which reduces the aerobic volume and limits nitrification capacity.Clarifier solids
loading usually limits the concentration of biomass available for nitrification,
so it’s common to increase bioreactor volume to increase treatment capacity. This
can be very expensive and even impossible if space is limited.
Download Civil Engineering Seminar on Biological nutrient removal in waste water
treatment.
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Civil Engineering Seminar
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Construction Chemicals For Waterproofing In Concrete Structures-Download Civil Engineering
Projects
Permeability is one of the main factors that can affect the durability of the structure.
Permeable structures can result for various reasons such as low cement content,
poor compaction too much water during concrete mixing etc. The passage of water
through cracks ,joints, voids, and inter connected capillaries in the mass concrete
makes the concrete pervious, ultimately leads to poor protection of structures,
increases the rate of alkali aggregate reaction and also accelerates the rate of
corrosion in the steel.
The impervious property of concrete can be improved by addition of admixture in
the green concrete or by surface treatments and the phenomenon is generally known
as waterproofing.The products used in both the stages of concrete are known as construction
chemicals or admixtures and waterproofing is one of the aspects in construction
aid.
These products are required for modifying the properties of concrete or mortar to
make them more suitable for the work at hand or for the economy for such purposes
are saving energy like Integral water proofing compounds,Acrylic based polymer coatings,Mineral
based polymer modified coating,Chemical DPC for rising dampness,Water proofing adhesive
for tiles, marble and granite,Silicon based water repellent material,Injection grouted
for cracks,Protective and decorative coatings,Joint sealants.
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Seminar
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LIQUEFACTION FAILURE OF FOUNDATION : STRUCTURE COLLAPSE-Download Civil Engineering
Projects
Lateral soil deformations (lateral spreading) have proven to be the most pervasive
type of liquefaction-induced ground failure. Lateral spreading involves the movement
of relatively intact soil blocks on a layer of liquefied soil toward a free face
or incised channel. These blocks are transported down-slope or in the direction
of a channel by both dynamic and gravitational forces. The amount of lateral displacement
typically ranges from a few centimeters to several meters and can cause significant
damage to engineered structures.
A number of failure modes may occur in pile foundations, depending on the conditions
of fixity, pile reinforcement and ductility. Generally, if concrete piles were well
embedded in the pile caps, shear or flexural cracks occurred at pile heads, often
leading to failure; if steel pipe piles were fixed tightly in the pile caps, failure
was at the connection or pile cap; or if the pile heads were loosely connected to
the pile caps, they either rotated or were detached.
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Seminar
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